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DESCRIPTION

The HCS201 from Microchip Technology Inc. is a code hopping encoder designed for secure Remote Keyless Entry (RKE) systems. The HCS201 utilizes the KEELOQ? code hopping technology, incorporating high security, a small package outline and low cost. The HCS201 is a perfect solution for unidirectional remote keyless entry systems and access control systems.

FEATURES

Security

? Programmable 28-bit serial number

? Programmable 64-bit encryption key

? Each transmission is unique

? 66-bit transmission code length

? 32-bit hopping code

? 34-bit fixed code (28-bit serial number, 4-bit button code, 2-bit status)

? Encryption keys are read protected

Operating

? 3.5V-13V operation (2.0V min. using the Step up feature)

? Three button inputs

? 7 functions available

? Selectable baud rate

? Automatic code word completion

? Battery low signal transmitted to receiver

? Non-volatile synchronization data

Other

? Simple programming interface

? On-chip EEPROM

? On-chip oscillator and timing components

? Button inputs have internal pull-down resistors

? Minimum component count

? Synchronous Transmission mode

? Built-in step up regulator